Improvement in blasting-powder



' compound for blasting-powder, as will-he herepotash; thirty pounds nitrate of soda; thirty' JOHN'H. DOLDEl, OF ST. LOUIS, MISSOURI, Assieivon 'oF ONE-HALF HIS RIGHT TO SAML. L. CARTER, OF sleME PLACE.

IMPROVEMENTIN 'BLASTING-P'OWDEIL- Specification forming part of Letters Patent No, 177,819, 7 April '18, 1876.

To all whom it may concern:

Be it known that I, JOHN H. DOLDE, of St. Louis, inthe county of St. Louis, and in the Stateof Missouri, have invented oertain' new and useful Improvements in Blasting-Powder; and do hereby declare that the following'is a full, clear, and exact des'Eription thereof.

The nature of my invention consists in .a

inatter more fully set forth. I

This com pound is composed of the following ingredients, in about the following proportions, viz: Five pounds silica; five pounds nitrate (if potash; twelve pounds chlorate or quarts water; forty pounds sawdust; ten pounds pulverized sugar; one ounce tannin.

'These ingredients are first-well pulverized,- ai'ter-whieh the nitrate of potash is dissolved in the water while boiling. Thechlor'ate'of potash is then added and dissolved; All the other ingredients are then put in, and allowed to cook or evaporate for several hours over a slow fire to about the consistency of paste.

sawdust, sugar,

dated Ma 23, 1876; application filed A The mass is 'th-fen' a-ken out and dried in the open'air, S llll,-0I' -kiln,and,when sodried, the' powder "is 'grain'e'd; by any i of the Well. known methods.

I do not confine/myself to the exaot "proportions of the ingredients herein described, as e varied according to the they may, perhaps, '0 quality of powder desired, or kind of Worki-ntended to be Having. thus fully what I claim as new, Letters Patent, is 1 The withiu-deseribed compound for blasting-po\\ 'der, consistin ash, chlorate of according-to the done. described my invention,

potash,- nitrate of soda,'wat'er,' and tannin, substantially as herein set forth.

'In testimony thatl'claim. the foregoing I have hereunto set my hand this 17th day of April, 1876.

4 JOHN HENRY DOLDE. Witnesses:

M. L. S'roWELL, 4

(J. M. ALEXANDER.

and desire to seeureby g of silica, nitrate of pot-' 

